ChemInform Abstract: Addition Reaction of Hydrazoic Acid and Carboxylic Acids with N-(p-Nitrophenyl)-N′-cyclohexylcarbodiimide.

ChemInform ◽  
1987 ◽  
Vol 18 (27) ◽  
Author(s):  
D. F. MIRONOVA ◽  
V. I. STANINETS
Keyword(s):  
Carboxylic Acids ◽  
Addition Reaction ◽  
Hydrazoic Acid

Some Derivatives of 1-Benzazepine. Part II

1974 ◽  
Vol 52 (4) ◽  
pp. 610-615 ◽  
Author(s):  
G. R. Birchall ◽  
A. H. Rees
Keyword(s):  
Carboxylic Acids ◽  
Ring Expansion ◽  
Hydrazoic Acid ◽  
Ring Contraction ◽  
Effect Of Substituents ◽  
Ring Expansion Reaction ◽  
Derivatives Of

We have investigated the ring expansion of some substituted 1,4-naphthoquinones by hydrazoic acid to yield new 1-benzazepine derivatives of the "azatropolone" type. Ring contraction of those products, which are 2,5-dihydro-3-hydroxy-2,5-dioxo-1-benzazepines, gives 4-quinolone-2-carboxylic acids. Some of the reactions of the new benzazepine system were investigated. Attempts to prepare substituted derivatives suitable for making 1-benzazatrop-5-one were not successful.The effect of substituents on the ring expansion reaction is discussed and an anomalous ring expansion to a 2,5-dihydro-4-hydroxy-2,5-dioxo-1-benzazepine is described and explained mechanistically.

Pd(0)–PhCOOH catalyzed addition of oxygen pronucleophiles to allenes and internal alkynes

2005 ◽  
Vol 83 (6-7) ◽  
pp. 569-573 ◽  
Author(s):  
Nitin T Patil ◽  
Nirmal K Pahadi ◽  
Yoshinori Yamamoto
Keyword(s):  
Benzoic Acid ◽  
Carboxylic Acids ◽  
Catalytic System ◽  
Addition Reaction ◽  
Internal Alkynes ◽  
High Yields

We have developed a catalytic system that enables the addition of alcohols to allenes using a combination of 5 mol% Pd(PPh3)4 and 10 mol% benzoic acid. Likewise, the addition reaction of carboxylic acids to alkynes is described. In all cases the reaction proceeded well, giving the corresponding allylation products in good-to-high yields with high regio- and stereoselectivities.Key words: addition, alcohols, carboxylic acids, allenes, alkynes, palladium.

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